Re: [Freedreno] [PATCH v2] drm/msm: reduce usage of round_pixclk callback

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On 1/5/2022 11:06 PM, Dmitry Baryshkov wrote:
The round_pixclk() callback returns different rate only on MDP4 in HDMI
(DTV) case. Stop using this callback in other cases to simplify
mode_valid callbacks.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
---
Changes since v1:
  - Rebased on top of HDMI changes
  - Dropped eDP part, driver got removed

---
  drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c  |  7 -------
  drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c |  7 -------
  drivers/gpu/drm/msm/dsi/dsi_manager.c    | 22 ----------------------
  drivers/gpu/drm/msm/hdmi/hdmi_bridge.c   | 11 +++++++----
  4 files changed, 7 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
index 47fe11a84a77..ebbee5f103e1 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c
@@ -774,12 +774,6 @@ static int _dpu_kms_drm_obj_init(struct dpu_kms *dpu_kms)
  	return ret;
  }
-static long dpu_kms_round_pixclk(struct msm_kms *kms, unsigned long rate,
-		struct drm_encoder *encoder)
-{
-	return rate;
-}
-
  static void _dpu_kms_hw_destroy(struct dpu_kms *dpu_kms)
  {
  	int i;
@@ -948,7 +942,6 @@ static const struct msm_kms_funcs kms_funcs = {
  	.disable_vblank  = dpu_kms_disable_vblank,
  	.check_modified_format = dpu_format_check_modified_format,
  	.get_format      = dpu_get_msm_format,
-	.round_pixclk    = dpu_kms_round_pixclk,
  	.destroy         = dpu_kms_destroy,
  	.snapshot        = dpu_kms_mdp_snapshot,
  #ifdef CONFIG_DEBUG_FS
diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
index 12a5f81e402b..20859fd7af4a 100644
--- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
+++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_kms.c
@@ -190,12 +190,6 @@ static void mdp5_complete_commit(struct msm_kms *kms, unsigned crtc_mask)
  		mdp5_smp_complete_commit(mdp5_kms->smp, &global_state->smp);
  }
-static long mdp5_round_pixclk(struct msm_kms *kms, unsigned long rate,
-		struct drm_encoder *encoder)
-{
-	return rate;
-}
-
  static int mdp5_set_split_display(struct msm_kms *kms,
  		struct drm_encoder *encoder,
  		struct drm_encoder *slave_encoder,
@@ -278,7 +272,6 @@ static const struct mdp_kms_funcs kms_funcs = {
  		.wait_flush      = mdp5_wait_flush,
  		.complete_commit = mdp5_complete_commit,
  		.get_format      = mdp_get_format,
-		.round_pixclk    = mdp5_round_pixclk,
  		.set_split_display = mdp5_set_split_display,
  		.destroy         = mdp5_kms_destroy,
  #ifdef CONFIG_DEBUG_FS
diff --git a/drivers/gpu/drm/msm/dsi/dsi_manager.c b/drivers/gpu/drm/msm/dsi/dsi_manager.c
index f19bae475c96..1dbbfca163d9 100644
--- a/drivers/gpu/drm/msm/dsi/dsi_manager.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_manager.c
@@ -305,27 +305,6 @@ static int dsi_mgr_connector_get_modes(struct drm_connector *connector)
  	return num;
  }
-static enum drm_mode_status dsi_mgr_connector_mode_valid(struct drm_connector *connector,
-				struct drm_display_mode *mode)
-{
-	int id = dsi_mgr_connector_get_id(connector);
-	struct msm_dsi *msm_dsi = dsi_mgr_get_dsi(id);
-	struct drm_encoder *encoder = msm_dsi_get_encoder(msm_dsi);
-	struct msm_drm_private *priv = connector->dev->dev_private;
-	struct msm_kms *kms = priv->kms;
-	long actual, requested;
-
-	DBG("");
-	requested = 1000 * mode->clock;
-	actual = kms->funcs->round_pixclk(kms, requested, encoder);
-
-	DBG("requested=%ld, actual=%ld", requested, actual);
-	if (actual != requested)
-		return MODE_CLOCK_RANGE;
-
-	return MODE_OK;
-}
-
  static struct drm_encoder *
  dsi_mgr_connector_best_encoder(struct drm_connector *connector)
  {
@@ -586,7 +565,6 @@ static const struct drm_connector_funcs dsi_mgr_connector_funcs = {
static const struct drm_connector_helper_funcs dsi_mgr_conn_helper_funcs = {
  	.get_modes = dsi_mgr_connector_get_modes,
-	.mode_valid = dsi_mgr_connector_mode_valid,
  	.best_encoder = dsi_mgr_connector_best_encoder,
  };
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
index 68fba4bf7212..10ebe2089cb6 100644
--- a/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_bridge.c
@@ -282,15 +282,18 @@ static enum drm_mode_status msm_hdmi_bridge_mode_valid(struct drm_bridge *bridge
  	long actual, requested;
requested = 1000 * mode->clock;
-	actual = kms->funcs->round_pixclk(kms,
-			requested, hdmi_bridge->hdmi->encoder);
/* for mdp5/apq8074, we manage our own pixel clk (as opposed to
  	 * mdp4/dtv stuff where pixel clk is assigned to mdp/encoder
  	 * instead):
  	 */
-	if (config->pwr_clk_cnt > 0)
-		actual = clk_round_rate(hdmi->pwr_clks[0], actual);
+	if (kms->funcs->round_pixclk)
+		actual = kms->funcs->round_pixclk(kms,
+			requested, hdmi_bridge->hdmi->encoder);
+	else if (config->pwr_clk_cnt > 0)
+		actual = clk_round_rate(hdmi->pwr_clks[0], requested);
+	else
+		actual = requested;
DBG("requested=%ld, actual=%ld", requested, actual);



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